I witnessed sheer arrogance and aggressive rudeness from one of the female staff members towards a gentleman last week. He was trying to sort out a problem and from her tone and attitude it was clear she thought he was the problem. She told him that her colleague had already gone 'above and beyond ' to help him and he politely pointed out that he would have no way of knowing what was Nat west policy in terms of going above and beyond. The interchange carried on for a good 10 minutes and while I would rather not have been waiting in the queue I was more worried about the crass and unprofessional treatment of another customer.